the answer ,Christian, is that Phrasal Verbs take A LOT of practice. They are one of the hardest things about learning English. "Hear me up" does not exist. "Hear me out" means to listen to my entire story/what I have to say. Each phrasal verb is different and follows different rules. You must learn them and it takes time. If you want to take a class on Phrasal Verbs, message me to start practicing.